WOOL ADAPTATIONS The finest wool is found on sheep living in desert regions of the world, including the U.S. Sheep with the longest wool are found in the cold climates that get a large amount of rain such as Great Britain. The most coarse wool is found amongst sheep adapted to extreme cold and windy conditions. The adaptations are so profound amongst sheep breed you can discern the animal’s origin from the wool on its body. Sheep with longer wool are sheared often by their human keepers for clothing.